Practice question
Question
Horns in sheep being dominant in males but recessive in females is an example of
Explanation
Sheep horn genetics exemplifies sex-influenced autosomal inheritance. Allele H conferring horned condition acts dominant in males due to testosterone-dependent activation of horn growth pathway, so genotypes HH and Hh males grow horns. Same genotypes in females remain polled because without androgen dominance reverses; only HH females may develop small horns, Hh females stay hornless. Autosomal segregation ratios hold when sexes analyzed separately, not showing X-linked pattern. This clearly contrasts with sex linkage where chromosome location determines transmission, and with sex-limited traits expressed only in one sex.
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